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LED streetlights contribute to insect population declines: study

LED streetlights contribute to insect population declines: study

14 Sept 13:01 Key points summarised by AI
  • A new study in southern England reveals that streetlights, especially white LED lights, significantly reduce insect populations, with moth caterpillars showing a 47% decline in hedgerows and 37% in grassy areas.
  • Researchers believe the decline is primarily due to female insects avoiding laying eggs in lit areas, alongside disrupted feeding behaviors, causing caterpillars to grow heavier as they may rush development.
  • The negative impact is most pronounced with energy-efficient LED lamps compared to older, yellow-orange high-pressure sodium (HPS) or low-pressure sodium (LPS) lamps.
  • While street lighting is a localized factor, these reductions have cascading ecological consequences, diminishing food sources for birds and bats.
  • Accessible solutions include applying filters to change lamp color or adding shields to direct light only onto roads, thereby protecting insect habitats.
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